Drawing board attachment



June 17, 1969 J. E. MACK 3,450,071

DRAWING BOARD ATTACHMENT Filed Sept. 28, 1967 INVENTOR. JOSEPH E. MAC K BY OLDHAM 8 OLDHAM ATTORNEYS United States Patent 3,450,071 DRAWING BOARD ATTACHMENT Joseph E. Mack, 247 Jennings Ave., Cuyahoga Falls, Ohio 44221 Filed Sept. 28, 1967, Ser. No. 671,283 Int. Cl. B43l /00 U.S. Cl. 108-50 2 Claims ABSTRACT OF THE DISCLOSURE This invention relates to drawing board, and more particularly to apparatus designed for the purpose of protecting the paper against wrinkles and creases by curling the paper through approximately 180 as it is slid off the surface of the board.

Heretofore it has been known that a draftsman would slide the paper over the drawing board edge nearest him and then carefully avoid pressing against the edge so he wouldnt crease the paper. This is an annoying inconvenience for the draftsman because it doesnt allow him to work comfortably or with 100% efiiciency.

It is the general object of this invention to avoid and overcome the foregoing difficulties that confront a draftsman by the addition of this invention to his drawing board.

The aforesaid object of the invention, and other objects which will become apparent as the description proceeds, are achieved by providing in a drawing board apparatus the combination of a drawing board having a large flat working surface and means mounted to the board so as to extend adjacent one end of the board to receive a piece of paper moved off the flat surface of the board at said one end and curling a paper without creasing or wrinkling through a path of approximately 180 to direct a paper so formed in substantially spaced parallel relation to said flat surface of the board.

In the drawings:

FIG. 1 is a perspective view of a preferred embodiment of the invention;

FIG. 2 is an enlarged vertical cross-section taken on line 2-2 of FIG. 1.

FIG. 3 is a broken-away enlarged vertical cross-section taken on line 33 of FIG. 2;

FIG. 4 is a broken-away enlarged vertical cross-section showing the curved paper guide plate and the holes therethrough;

FIG. 5 is a vertical cross-sectional taken on line 55 of FIG. 2; and

FIG. 6 is a vertical cross-section through a modified form of a novel drafting board.

Now with specific reference to the form of the invention illustrated in the drawings, the numeral 10 indicates generally the improved drawing board of the invention which comprises a large, rectangularly-shaped drawing board 12, normally made of wood or other suitable material, and this board may be of a conventional size mounted to a desk, table, or other support for all type drawing applications. The standard board 12 is modified by a one-piece paper guide plate 14, which is illustrated in mounted position to the board in FIG. 1 of the drawings. Essentially, the guide plate 14 comprises a curved end portion 16 which defines a substantially semi-circular shape and extends into a flat bottom tray portion 18. The edges or sides of the tray portion 18 are bent to form L- shaped flanges 20 and 22, as best illustrated in FIG. 5 of the drawings. The plate 14 is actually mounted to the bottom of the board by a plurality of screws 24 passing through respective flanges 20 and 22 and into the board, all as best seen in FIG. 5 of the drawings.

The semi-circularly curved portion 16 of the guide plate 14 may terminate in an end curled back on itself and which may also extend around a rod 26 which eliminates sharp edges, and also strengthens the plate 14. The ends of rod 26 are curved downwardly at 28 and have end loops 30 therein which are secured to the board 12 by appropriate screws 32 as best shown in FIGS. 3 and 4 of the drawings, but such rod may be eliminated, if desired.

Thus, it should be understood that the curved portion 16 of plate 14 will normally be positioned on the side, or end of the drawing board towards which the paper placed on the drawing board for drawing, etc., is to be pushed or slid for storage of the paper without wrinkling or creasing thereof. FIG. 2 illustrates a piece of paper which has been slid to the right in the direction of arrow 42 so that the end of the paper came into engagement with curved portion 16 of plate 14 and was curled through approximately a 180 angle by the semi-circular portion 16 and then extended in flat relationship onto the bottom surface 18 of plate 14, all as shown clearly in FIG. 2 of the drawings. Naturally, when a paper of sufiicient length is pushed on through it will extend out the open end from the fiat portion or bed 18 of plate 14. But in any instance, the paper will not be wrinkled or creased because of the large diameter in the curved portion 16 causing the curling without crinkling, wrinkling, or creasing of the paper. Preferably, the curled edge of the curved portion 16 of plate 1-4 should be positioned so as to extend approximately one-eighth inch above the top fiat drawing surface of board 12, and this is best indicated in FIG. 3 of the drawings.

In order to facilitate disposal of eraser crumbs utilizing the apparatus of the invention, a plurality of holes 34 ranged in staggered relationship around the bottom portion of the curved area 16 of plate 14 are cut through plate 14 so that erasure crumbs 36, as best seen in FIG. 4 of the drawings can drop therethrough, all as indicated.

Thus, it should be understood that the curved portion 16 of plate 14 protects the part of the paper in contact with the edge of the drawing board from contact with the draftsmans elbows, or other equipment, thus allowing the paper to be uncreased and unwn'nkled as it moves laterally across the surface of the drawing board and is curled by the curved portion. Also, the draftsman utilizing this type of board is now able to work more comfortably and more efiiciently because there is no worry of creasing the paper against the edge of the drawing board.

FIG. 6- shows a drafting board 12a that is provided with a recess in the center portion of its lower surface and extending to the front edge thereof, as it frequently is desirable to attach a tray 52 to the board 12a, such tray is shown provided with an attaching plate 54 secured thereto or formed therewith. Such tray usually extends the width of the board. The tray or means 52 includes an arcuate surface 56 that is positioned immediately adjacent but spaced from the front edge of the board. Thus paper can be slid from the board to engage the arcuate surface 56 and be guided around into the recess 50. The tray 52 may be made in any desired manner but it preferably in molded from plastic material and is attached to the board 12a to provide a paper receiving slot therebetween. Of course, portions of the tray 52 may be omitted and just the portion of the tray providing the arcuate surface 56 be formed and attached to the board for proper guiding action.

While in accordance with the patent stautes only one preferred embodiment of the invention has been illustrated and described, it is to be understood that the invention is not limited thereto or thereby.

1. In a drawing board apparatus, the combination of (1) a drawing board having a large fiat working surface, and

(2) means mounted to the board so as to extend adjacent one end of the board to receive a piece of paper moved off the fiat surface of the board at said one end and curl a paper without creasing or wrinkling through a path of approximately 180 to direct a paper so formed in substantially spaced parallel relation to said flat surface of the board, said means being a curved paper guide plate mounted on opposite sides of said board and extending above the plane of said flat working surface at said one end of the board, the guide plate curves through approximately 180 and then has a large flat surface mounted in spaced relation to the bottom of the board and substantially parallel to the large flat working surface thereof, and the guide plate having a plurality of holes therethrough spaced across the width thereof and around most of the curved por- What is claimed is:

tion thereof to allow eraser crumbs collecting on a paper curled by said guide plate to pass through the holes.

References Cited UNITED STATES PATENTS Pizzonia 108-50 X Joy 10850 Matthews 10828 Sheinwald 108-5'0 Vanek l08-50 X CASMIR A. NUNBERG, Primary Examiner.

G. O. FINCH, Assistant Examiner. 

